If you ask BRS, for example, if their dosing pumps are designed to be operating 24/7, they will tell you absolutely not. As will most dosing pump manufacturers. For a calcium reactor, water should be pumped in and out at a constant metered pace to keep things consistent. It's very tough to find a pump that is capable of operating constantly, and is capable of overcoming the occasional pressure of clogged effluent lines, etc. it's for this reason why masterflex pumps have such a strong following among calrx users. There are others in the game, kamoer makes a calrx peri pump now, and of course there's the Dastaco calcium reactors thatre at a whole other level.